Our high-tech Work-Dry® all-terrain crew sock features graduated compression to ensure legs and feet stay energized. It also has Friction-Free® fibers in the heel and toe to reduce the likelihood of blisters, mesh cooling panels and instep channels to promote air flow, plus a braced arch support to add stability. The heel tab design shields the Achilles from abrasion and keeps the sock from slipping into the shoe. A resilient wool/acrylic blend transports moisture, naturally combats odor and retains its shape wash after wash.